Valve stem



y 1939- J. c. CROWLEY 2,160,398

VALVE STEM ori inal Filed March 2 1954 INVENTOR. JH-N 6' CR0 WLEY ATTORNEY-S Patented May 30, 1939 other:

aicasea vALvns'mM s John C. Crowley, Cleveland Heights, Ohio, as-

signor to The Dill Manufacturing Company, Cleveland, Ohio, a corporation of Ohio Originalapplication March 26, 1934, Serial No.

717,327, now Patent No. 2,094,264, dated Sep-' tember 28, 1937.

Divided and thisapplication March 10, 1937, Serial No. 130,051

1 Claim.

This invention relates to a valve stem and.

valve for inflatable articles such for example as pneumatic tires.

This application is 'a division of application Serial No. 717,327, filed March 26, 1934, and now Patent No. 2,094,264, granted September 28, 1937. a

' An object of the invention is to provide a combined valve stem and valve that is so constructed as to'eliminate the use of separate valve insides I and valve springs in the stem.

vention which is illustrated in the accompanying drawing wherein Fig. 1 is a sectional view on a somewhat en-' larged scale of a valve stem, and valve embody- .ing the invention.

Fig. 2 is a view similar to Fig. 1 showing the stem as it is molded and before the valve pin and valve have been added thereto, and 30 Y Figs. 3, 4 and 5 are sectional views taken respectively on lines 3-4, 4-! and 55ot Fig. 1 looking in the direction of the arrows. Referring to the drawing, the valve stem comprises a base I II and a stem proper ll,-said base 35 and stem proper being integral and formed of molded rubber. There is a bore 12 extending from the inner side of the base l0 outwardly of thestem to the point I3 which is the inner end of an internal portion l4 oi the valve stem, such 4o portion ll being integrally connected to the stem between the points l3 and IS.- outwardly of the point IS the internal portion It extends into an enlarged bore l6, there being an annularspace 'I6a between the portion II and the wall of the 45 bore 16. The bore I6 is connected to the borel2 by means of arcuate slots I! located .on diametrically opposite, sides/oi the portion ll-and'extending downwardly thereof from the point l5 to belowthe point II. The outer end of the.

50 portion 14; that is the end that is in the enlarged bore I, is providedwith a transverse groove l8 fora purpose later to be explained.

The stem "II at its outer end is provided with a bore l9 communicating with a passage a .formed in a .me'tal insert 21 which has its inner depressed by the us end provided with annular laterally projecting ribs 22 and which is arranged in acounterbore formed in the outer end of the stem. .The insert 2i has a threaded end projecting beyond the end' of the stem and is molded into the end of the 5 stem as clearly indicated in the drawing. to become, in efiect, an integral part of the stem. The bores IG- and I9 in the stem are connected by a restricted passage that is formed by an inwardly extending annular tapered projection. 10 integral with the stem and providing a tapered or conical seat on its underside against which a conical valve 24 can seat. The conical valve 24 carries the inwardly or downwardly extending portion 25 having at its inner end a projection 15 or transverse rib 26 interfitting the slot l8 in the outer end of the portion ll of the stem. The

.valve 24 also carries an outwardly extending jection will return to its 'normal configuration defining the restricted opening The projection or rib 26 on the downwardly extending portion 25 of the valve ill engage in the slot l8 of the portion l4 -0f the stem and the valve and portion M will then move together. Althoughthe valve for purposes of assembly may be pushed through .the opening defined by the projection 23, it will be understood that when once mounted in the stem the air pressure will not be suiiicient to force the valve outwardly through said opening and that the conical valve will bear against the complementary conical seat afforded by the underside of the projection 23eand thus seal the and the stem and tube, in effect, made an integral 5 structure. When the tire tube equipped with such stem is mounted in a tire casing and placed upon a wheel rim, the'stem will be pulled through the rim opening and when the tube is inflated will be held in extended position. I In inflating the tube an air chuck or other fitting onan air line is applied to the outer end of .the metal insert 2| and the valve pin 21 is means for this purpose that is arranged in the conventional air chucks,

uninterrupted air passageway through-the stem 5 into the tube, which passageway includes the passage 20 through the insert, the bore l9, therestricted opening defined by the projection 23, the bore It the annularspace I80 between the portion I4 and the wall of the bore IO, the armate slots I1 and the bore I2. I 7

when the tube has been properly inflated removal of the air chuck from the metal insert 2| allows the portion M which has been compressed to expand to its normal position and to thus 1 bring the valve 24 into sealing engagement with the valve seat formed on the projection 23. Of course, an air gauge or other device can be applied to the outer end or the insert and the valve 24 moved oi! its seat in a similar manner.

Itwill be noted that the passageways for the air through the stem are ,of ample magnitude to allow quick inflation and deflation oi the tube and that the stem and valve seat being one integral molded structure is sturdyand will last I for the life oi. the tube.

A combined valve stem and. valve such as has just been described possesses the advantage of being inexpensive, inasmuchlas it eliminates the necessity oi the use of separate valve insides I and valve springs in the stem. In addition, the stem also possesses the useful function of a rubber stem which allows the stem to pull through ceptible 01' various modifications and adaptations within the scope of the appended claim.

Having thus described my invention I claim:

A combined'v'alve and valve stem comprising a molded rubber stem adapted to be connected to a tire tube said stem being provided with a bore extending inwardly from the outer end of the stem toward its inner end and with a bore extending from the inner end of the stem toward its outer end, a rubber portion integrally molded in said stem between said bores and extending into said first named bore and of less diameter than said first named bore and provided at its free end with a \transverse slot, arcuate slots formed in said stem adjacent said portion and connecting said bores, means integral with the stem intermediate the ends. of said first named bore forming a restricted opening and a valve seat, and a conical valve having a pin extending through said opening toward the outer end of the stem ,and an inwardly extending projection engaging the transverse slot in the end of said portion whereby said valve is normally held seated by said portion against said valve seat to seal the opening.

-- JOBN C. CROWLEY. 

